Fig. 3.

Sequence of the start of a typical experimental session. A: the group home cage with a single rat that has already passed reader 1 and gate 1 and entered the sorter. B: sorter gates are closed and the software ensures that only a single animal has entered. C: gate 2 has opened and the rat enters the tube to the Servoball arena. From the platform surrounding the sphere (D), the rat can enter the experimental arena (E) through the lifted cylinder. F: staying in the center of the experimental arena, the rat initializes the lowering process of the cylinder. G: rat shut in the arena with the cylinder moved downwards. For the description of a sequence of a typical experimental session, see text.